div form {
    background-color: #AAFBBF;
    border: bisque 1px solid;
}

div {
    background-color: #88FFFF;
}

.bookList {
    width: 1000px;
    margin: 20px auto;
    text-align: center
}
.top{
    background-color:#8F8D3F;
    height: 80px;

}
.b_left{
    background-color: #B6B6FF;
    float: left;
    width: 20%;
    height: 800px;
    font-size: 25px;

}
.b_right{
    float: right;
    width: 80%;
    height:800px;
    font-size: 17px;

}
.s li {
    display: block;
    height:100%;
    width: 240px;
    border: 3px outset darkgray;
    margin: auto;
}
.ss {
    display: none;
}

.below li:hover ul {
    display: block;
    height:100%;

}
